/*
 * Copyright (c) 1998, 2013, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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 */

package java.security;


/**
 * A computation to be performed with privileges enabled, that throws one or
 * more checked exceptions.  The computation is performed by invoking
 * {@code AccessController.doPrivileged} on the
 * {@code PrivilegedExceptionAction} object.  This interface is
 * used only for computations that throw checked exceptions;
 * computations that do not throw
 * checked exceptions should use {@code PrivilegedAction} instead.
 *
 * @see AccessController
 * @see AccessController#doPrivileged(PrivilegedExceptionAction)
 * @see AccessController#doPrivileged(PrivilegedExceptionAction, AccessControlContext)
 * @see PrivilegedAction
 */

public interface PrivilegedExceptionAction<T> {

  /**
   * Performs the computation.  This method will be called by
   * {@code AccessController.doPrivileged} after enabling privileges.
   *
   * @return a class-dependent value that may represent the results of the computation.  Each class
   * that implements {@code PrivilegedExceptionAction} should document what (if anything) this value
   * represents.
   * @throws Exception an exceptional condition has occurred.  Each class that implements {@code
   * PrivilegedExceptionAction} should document the exceptions that its run method can throw.
   * @see AccessController#doPrivileged(PrivilegedExceptionAction)
   * @see AccessController#doPrivileged(PrivilegedExceptionAction, AccessControlContext)
   */

  T run() throws Exception;
}
